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scichina.com

中国科技期刊国际传播和知识服务平台是一个以科技类学术期刊为主要传播经营对象的国际化数字出版传播和知识服务平台。平台借助中国科技出版传媒股份有限公司出版的丰富、优质、专业的学术期刊内容，经过整合、重组，打造生成各种形态的数字化产品，集聚中国科学院乃至国内外的高水平学术期刊资源，实现全方位生产运营、传播和知识服务。

orientjchem.org

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doaj.org

A peer-reviewed, open access journal in soil health, sustainable development, soil science, ecosystem services & biogeochemical cycles.

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arxiv.org

A system of non-tradable credits that flow between individuals like karma, hence proposed under that name, is a mechanism for repeated resource allocation that comes with attractive efficiency and fairness properties, in theory. In this study, we test karma in an online experiment in which human subjects repeatedly compete for a resource with time-varying and stochastic individual preferences or urgency to acquire the resource. We confirm that karma has significant and sustained welfare benefits even in a population with no prior training. We identify mechanism usage in contexts with sporadic high urgency, more so than with frequent moderate urgency, and implemented as a simple (binary) karma bidding scheme as particularly effective for welfare improvements: relatively larger aggregate efficiency gains are realized that are (almost) Pareto superior. These findings provide guidance for further testing and for future implementation plans of such mechanisms in the real world.